The missing crew members – all South Korean nationals – are said to have been in the engine room of the ship, according to the South Korean Foreign Ministry.
However, the rescue efforts have come to a standstill, as a fire on the ship is at risk The safety of the emergency services, said the authorities. The 656-foot cargo ship stays on its side in the waterway, about 80 miles south of Savannah.
The first shipments came from the boat, according to US Coast Guard Lt. Phillip VanderWeit.
The South Korean Foreign Ministry said the boat had made a "strong listing" of about 80 degrees to the port side before tipping over. Twenty crew members were rescued by the US Coast Guard at 4 and 5 in the morning, according to VanderWeit.
The rescued descended over various parts of the ship, which was a challenge to get them from the ship.
Some crew members were hoisted on helicopters while others, according to VanderWeit, were lowered onto boats in some cases by fire hoses.
Four crew members could not be rescued when ship broke out on the ship, preventing rescuers At a press conference, Captain John Reed, Commander of the Coast Guard in Charleston, said.
"When smoke and flames surfaced, our crews and Glynn County Rescue Team estimated the situation was too risky to go inside the ship to try to find the four missing persons," Reed said.
Officials are waiting for stabilization of the ship before attempting further rescue, but are not sure if the fire is extinguished.  "We can not pinpoint whether the fire was completely extinguished without going in," he said.
Although the rescue efforts have come to a standstill, the Coast Guard remains on-site next to the boat to stabilize the ship.
VanderWeit said the Coast Guard continues to search the ship. The "suspended" search, however, means they had to get off the ship due to fires and instability.
Rescued crew members received food and clothing
The rescued were supported by the International According to Vicki West, director of the Maritime Center in Brunswick, Georgia.
West emailed CNN that their organization had provided food and clothing to between 18 and 20 crew members of the overturned cargo ship originating from Philippines and South Korea.
She said the rescued crew members are in good condition.
Volunteers from their organization served them the lunch donated by Grandy & # 39; s, a local restaurant in Braunschweig, and helped those who wanted to attend Mass in the Catholic Church of St. Francis Xavier.
Bags of toiletries, socks, toothpaste and games Some of them were donated to the center by the community and made available to the crew members as they recovered from their gruesome night. Everyone took one, West said.
The officers are still trying to determine why the boat overturned.
Two investigators from the National Transportation Safety Board are expected to arrive, according to NTSB spokesman Keith Holloway, assisting his agency to investigate the incident by the Coast Guard. The Coast Guard Claims Assessment Team was present on Sunday night According to a Coast Guard press release, the Georgia Department of Natural Resources (DNR) and the Glynn County Fire Department are among the parties involved in the incident.
The South Korean Foreign Ministry sent a consulate of the Consulate General in Atlanta to the scene of the accident to determine the status of crew rescue and consular assistance for the rescued South Korean crew members.
The Ministry of Maritime Affairs and Fisheries has formed and is responding to a working group on the protection of Koreans overseas. The Foreign Ministry said in a statement.
The cargo ship owned by Hyundai Glovis transports vehicles and was unloaded and transshipped by dockers in the hours before the start of mooring in the port of Braunschweig, according to a docker who spoke with him CNN.
CNN has turned to Hyundai Glovis, but has not received a response.
The dockworker said the charging process had gone smoothly and nothing happened during the charging process.
While the investigators are tracking down the missing crewmembers and identifying the cause, according to Cmdr. Norm Witt of the Marine Safety Unit Savannah of the Coast Guard.
No "active release" of pollution was reported until Sunday afternoon, but a unified command was set up to respond, Witt said.
Although the contamination has not yet been detected, health officials of the coastal region of Georgia issued a precautionary swim notice for the beaches of St. Simons and Jekyll Island, saying that the Department of Coastal Resources of the Georgian Ministry of Natural Resources has a Water quality testing to ensure the safety of harvesting shell bottoms and swimming beaches
Amanda Jackson, Sarah Faidell, Dakin Andone and Melissa Alonso of CNN contributed to this report.